http://arxiv.org/abs/1401.5797
We present a new simple functional form that may be used to model the evolution of a spherical mass distribution in a cosmological context. Two parameters control the growth of the system and this is modeled using a redshift dependent exponential for the scale mass and scale radius. In this new model, systems form inside out and the mass of a given shell can be set to never decrease, as generally expected. This feature makes it more suitable for studying the smooth growth of galactic potentials or cosmological halos than other parametrizations often used in the literature. This is further confirmed through a comparison to the growth of dark matter halos in the Aquarius simulations.
Fri, 24 Jan 14
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